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Asked: 2026-05-14T14:07:28+00:00

I am developing an iPad application which is basically a big drawing canvas with

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I am developing an iPad application which is basically a big drawing canvas with a couple of button at the side. (Doesn’t sound very original, does it? :P)

No matter how the user holds the device, the canvas should remain in place and should not be rotated. The simplest way to achieve this would be to support just one orientation.

However, I would like the images on the buttons to rotate (like in the iPhone camera app) when the device is rotated. UIPopoverControllers should also use the users current orientation (and not appear sideways).

What is the best way to achieve this?

(I figured I could rotate the canvas back into place with an affineTransform, but I don’t think it is ideal.)

Thanks in advance!

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  1. Editorial Team

    I discovered a way to do this, similar to what Dave DeLong proposed.

    Using a transform worked, but it wasn’t ideal. Although the end result (end of the animation) was what I wanted, it would stay show some kind of shaky rotation animation.

    Then I found this:

    https://developer.apple.com/iphone/library/qa/qa2010/qa1688.html

    Which says that a second (or third etc.) UIViewController added to the WINDOW would not receive rotation events, and therefore would never rotate. And that worked!

    I created a ‘fake’ UIViewController with a blank view and added that as the first view controller. This receives the rotation events which I then pass on to the other view controllers that can then choose whether to rotate – the entire view or just button labels.

    It is a bit hacky… But I guess the user won’t notice.

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